This IDE & SATA to USB adapter lets you access any 2.5-inch and 3.5-inch IDE or SATA 1.5 Gb/s hard drive or 5.25-inch optical drive through a USB port. Just plug your drive into the adapter, power it up, and connect it to your Mac or Windows system. With this adapter, you can access your old drives without having to install them in your system or you can connect an IDE and Serial ATA drive simultaneously to copy between them! With its One Touch Backup button, backing up your data is as easy as ever!